In other funky Haskell gui news, haskell-haha has also been released and packaged for Arch, and lets us do vector graphics in ascii in the terminal…. hell yeah!
Here’s a video of haha at work, and how to get it via cabal (yaourt also works fine):

Happstack is a refreshingly innovative web application server written in Haskell. Leveraging the MACID state system, Happstack offers robust and scalable data access without the headache of managing a traditional RDBMS such as MySQL.

This version of the package appears to add some new safety via type-level library:

This library permits performing computations on the type-level. Type-level functions are implemented using functional dependencies of multi parameter type classes. To date, Booleans and Numerals (Naturals and Positives) are supported. With regard to Numerals, there is support for common arithmetic operations (addition, substraction, multiplication, division, exponientation, logarithm, maximum, comparison, GCD) over natural numbers (using a decimal representation to make compile-time errors friendlier).

Lennart Augustsson informs us that type-level is used in the llvm binding to

keep track statically of vector lengths

sure that they are a power of 2

making sure that zero and sign extension between integer types go from a smaller to a bigger type

making sure that bitcast is done between types of the same number of bits

For a rather stunning example of what you can do with the Haskell LLVM embeddings — something you won’t see anywhere else — check out Lennart Augustsson’s embedding of BASIC in Haskell as a DSL, which also generates very competitive native code via LLVM…

Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer. It is used by MPEG playback software, emulators, and many popular games, including the award winning Linux port of “Civilization: Call To Power.”

Also now available, a new package: hexpat-pickle: XML picklers based on hexpat, almost source code compatible with HXT.

This package allows Haskell data structures to be pickled to/from the Tree datatype defined in the hexpat package. It is almost source code compatible with the pickling functionality of the HXT package, to allow you to switch easily between the two implementations.